01 -
1½ tablespoons olive oil.
02 -
2½ tablespoons salted butter.
03 -
Kosher salt, to taste.
04 -
Fresh black pepper, to taste.
05 -
24 ounces store-bought gnocchi.
06 -
2 pounds yellow onions, halved and thinly sliced.
07 -
1½ tablespoons fresh thyme, finely chopped.
08 -
6 cloves garlic, minced.
09 -
½ cup dry white wine (Sauvignon Blanc).
10 -
2½ teaspoons dijon mustard.
11 -
2½ tablespoons all-purpose flour.
12 -
1 teaspoon worcestershire sauce.
13 -
1 large bay leaf.
14 -
2½ cups low sodium beef stock.
15 -
1½ cups gruyere cheese, freshly grated.
16 -
½ cup parmesan cheese, freshly grated.